Quick Link and Video: InfoVis of Social Interactions of Children at School

Stehlé J, Voirin N, Barrat A, Cattuto C, Isella L, et al. 2011 High-Resolution Measurements of Face-to-Face Contact Patterns in a Primary School. PLoS ONE 6(8): e23176. doi:10.1371/journal.pone.0023176

The article that explains it all:

Visualized: A School Day as Data

Brandon Keim, Wired Science, 8/19/11 

The video: Contact patterns between the students. (Barrat et al./PLoS One)

Thanks to George Siemens for sharing this video!